body {
    font-size: 12px;
    margin: 0px;
    padding: 0px;
    font-family: SimSun,Helvetica,Verdana,Tahoma,arial,sans-serif;
}

form {
    margin: 0px;
    padding: 0px;
}

.c_center {
    margin-left: auto;
    margin-right: auto;
    border-width: 0px;
}

.c_centerno {
    margin-left: auto;
    margin-right: auto;
    border-width: 0px;
}

.c_centernoborder {
    margin-left: auto;
    margin-right: auto;
}

.div_fengexian {
    margin-left: auto;
    margin-right: auto;
    font-size: 1px;
    clear: both;
    line-height: 0px;
}

.c_middle {
    margin-left: 5px;
    margin-right: 5px;
}

.c_left {
    margin-left: 5px;
}

.c_right {
    margin-right: 5px;
}